Compression molding equipment and compression molding method

Abstract

The invention relates to compression molding equipment and a compression molding method. The compression molding equipment comprises a furnace body, a molding carrier, a first male die, a second male die, an annealing device and a cooling device. The furnace body is provided with a heating cavity, a first pressing cavity, a second pressing cavity, an annealing cavity and a cooling cavity which communicate with one another. The forming carrier comprises a forming mold and a transfer carrier, the forming mold is used for bearing a to-be-formed glass assembly, and the transfer carrier is used for transferring the to-be-formed glass assembly to the heating cavity, the first pressing cavity, the second pressing cavity, the annealing cavity and the cooling cavity in sequence. The first male die is used for pressing downwards relative to the forming die so as to press the to-be-formed glass assembly transferred to the first pressing cavity. The second male die is used for pressing downwards relative to the forming die so as to conduct secondary pressing on the to-be-formed glass assembly transferred to the second pressing cavity. The to-be-formed glass assembly is subjected to secondary pressing through the first male die and the second male die, so that the molded surface deviation of the to-be-formed glass assembly is reduced, and the optical performance and the production efficiency are improved.

Description

Technical Field

[0001] This application relates to the technical field of press forming equipment, and particularly to press forming equipment. Background Art

[0002] In the forming process of laminated glass, a male mold is often used to press two or more glass plates into shape. The forming process steps are as follows: stack two or more glass plates and place them on a forming mold that conforms to their final curved shape. In the pressing area, press the glass to the final shape through a single male mold, and finally send these two or more pieces of glass to the laminating process for bonding.

[0003] However, during the pressing process, due to the viscoelasticity of the glass plate at high temperatures, the shape of the glass plate will have a large springback after pressing, resulting in a large deviation in the surface shape of the glass plate. In addition, the male mold needs to be in contact with the glass plate for a long time during press forming, and the long-term contact will affect the optical properties of the formed glass. Secondly, it will lead to a slower production beat and reduce production efficiency. Summary of the Invention

[0004] Based on this, it is necessary to provide a press forming equipment and a press forming method to solve the problems of large deviation in the formed surface shape of the glass plate, great influence on the optical properties of the glass plate, and low production efficiency existing in the traditional glass forming process.

[0005] On the one hand, this application provides a press forming equipment, which includes:

[0006] A furnace body, which is provided with a heating chamber, a first pressing chamber, a second pressing chamber, an annealing chamber and a cooling chamber that are interconnected;

[0007] A forming carrier, which includes a forming mold and a transfer carrier. The forming mold is used to carry the glass component to be formed, and the transfer carrier is used to sequentially transfer the glass component to be formed to the heating chamber, the first pressing chamber, the second pressing chamber, the annealing chamber and the cooling chamber;

[0008] A first male mold, which is arranged in the first pressing chamber and is used to press down relative to the forming mold to press the glass component to be formed transferred to the first pressing chamber;

[0009] A second male mold, which is arranged in the second pressing chamber and is used to press down relative to the forming mold to press the glass component to be formed transferred to the second pressing chamber;

[0010] An annealing device, which is arranged in the annealing chamber;

[0011] A cooling device, which is arranged in the cooling chamber.

[0012] The above-mentioned compression molding equipment performs two-stage pressing on the glass component to be formed through the first punch and the second punch, which helps to reduce the springback of the glass component to be formed, and then reduces the surface deviation of the glass component to be formed. In addition, performing two-stage pressing on the glass component to be formed through the first punch and the second punch helps to shorten the time of single-stage pressing, and then can improve the optical performance of the glass component to be formed and improve the production efficiency.

[0013] In one embodiment, the glass component to be formed has a standard forming surface, the first punch has a first convex surface, the maximum curvature of the surface of the first convex surface is greater than the maximum curvature of the surface of the standard forming surface, and the range of the surface tolerance between the first convex surface and the standard forming surface is 0 mm - 15 mm.

[0014] In one embodiment, the first convex surface has a first arc edge along its contour, and the range of the tolerance between the position with the maximum curvature of the first convex surface at the first arc edge and the standard forming surface is 0 mm - 4 mm.

[0015] In one embodiment, the range of the tolerance between the position with the maximum curvature of the first convex surface at the first arc edge and the standard forming surface is 0.5 mm - 2.5 mm.

[0016] In one embodiment, the second punch has a second convex surface, the maximum curvature of the surface of the second convex surface is greater than the maximum curvature of the surface of the standard forming surface, and the range of the surface tolerance between the second convex surface and the standard forming surface is 0 mm - 15 mm.

[0017] In one embodiment, the range of the surface tolerance between the first convex surface and the second convex surface is -10 mm - 10 mm.

[0018] In one embodiment, the second convex surface has a second arc edge along its contour, and the range of the tolerance between the position with the maximum curvature of the second convex surface at the second arc edge and the standard forming surface is 0 mm - 4 mm.

[0019] In one embodiment, the range of the tolerance between the position with the maximum curvature of the second convex surface at the second arc edge and the standard forming surface is 0.5 mm - 2.5 mm.

[0020] In one embodiment, the forming die is in a hollow ring shape and has a forming arc edge along its contour.

[0021] In one embodiment, in the plane direction where the forming die abuts against the glass component to be formed, the width of the forming die ranges from 2 mm to 6 mm.

[0022] In one embodiment, the forming arc edge is configured such that when the first punch presses down relative to the forming die to press the glass component to be formed transferred to the first pressing cavity, the tolerance range between the position with the maximum curvature of the forming arc edge and the first convex surface is less than or equal to 3 mm.

[0023] In one embodiment, the forming arc edge is configured such that when the first punch presses down relative to the forming die to press the glass component to be formed transferred to the first pressing cavity, the tolerance range between the position with the maximum curvature of the forming arc edge and the first convex surface is less than or equal to 1.5 mm.

[0024] In one embodiment, a control system is further included, and the control system is used to control the downward pressing positions, downward pressing pressures, and downward pressing times of the first punch and the second punch relative to the glass component to be formed respectively.

[0025] On the other hand, the present application also provides a pressing and forming method, which uses the above-mentioned pressing and forming equipment, and includes the steps of:

[0026] Place the glass component to be formed on the forming die;

[0027] Transfer the transfer carrier to the heating cavity and heat the glass component to be formed;

[0028] Transfer the transfer carrier to the first pressing cavity;

[0029] The first punch presses down relative to the forming die to perform the first pressing on the glass component to be formed;

[0030] Transfer the transfer carrier to the second pressing cavity;

[0031] The second punch presses down relative to the forming die to perform the second pressing on the glass component to be formed;

[0032] Transfer the transfer carrier to the annealing cavity and start the annealing device to perform annealing;

[0033] Transfer the transfer carrier to the cooling cavity and start the cooling device to perform cooling.

[0034] In one embodiment, in the step of the first punch pressing down relative to the forming die to perform the first pressing on the glass component to be formed, the range of the first pressing time for the first punch to press the glass component to be formed is 5 s to 15 s.

[0035] In one embodiment, in the second pressing step of pressing the to-be-formed glass component by the second punch relative to the forming die, the value range of the second pressing time of the second punch pressing the to-be-formed glass component is 5 s - 15 s.

[0036] In one embodiment, the value range of the sum of the first pressing time and the second pressing time is 10 s - 20 s.

[0037] In one embodiment, in the first pressing step of pressing the to-be-formed glass component by the first punch relative to the forming die, the first downward pressing pressure of the first punch relative to the to-be-formed glass component is 10% - 100% of the weight of the first punch.

[0038] In one embodiment, the first downward pressing pressure is 50% - 80% of the weight of the first punch.

[0039] In one embodiment, in the second pressing step of pressing the to-be-formed glass component by the second punch relative to the forming die, the second downward pressing pressure of the second punch relative to the to-be-formed glass component is 10% - 100% of the weight of the second punch.

[0040] In one embodiment, the second downward pressing pressure is 50% - 80% of the weight of the second punch.

[0041] This application applies the above pressing and forming method, and presses the to-be-formed glass component twice through the first punch and the second punch, which helps to reduce the springback of the to-be-formed glass component, and then reduces the surface deviation of the to-be-formed glass component. In addition, pressing the to-be-formed glass component twice through the first punch and the second punch helps to shorten the time of a single pressing, and then can improve the optical performance of the to-be-formed glass component and improve the production efficiency. Description of the Drawings

[0042] Figure 1 It is a schematic structural diagram of a pressing and forming device in an embodiment of this application.

[0043] Figure 2 is Figure 1 a schematic structural diagram of the first punch and the forming die of the shown pressing and forming device.

[0044] Figure 3 It is a schematic structural diagram of the first arc edge of the first punch in another embodiment.

[0045] Figure 4 is Figure 1 a schematic structural diagram of the second punch and the forming die of the shown pressing and forming device.

[0046] Figure 5 It is a schematic structural diagram of the second arc-shaped edge of the second punch in another embodiment.

[0047] Figure 6 It is a schematic structural diagram of the first arc-shaped edge of the first punch and the forming arc edge of the forming die in one embodiment.

[0048] Figure 7 It is a flowchart of the pressing and forming method in one embodiment of the present application.

[0049] Explanation of the reference numerals in the drawings

[0050] 10. Glass assembly to be formed; 11. Standard forming surface; 100. Furnace body; 110. Heating chamber; 120. First pressing chamber; 130. Second pressing chamber; 140. Annealing chamber; 150. Cooling chamber; 200. Forming carrier; 210. Forming die; 211. Forming arc edge; 220. Transfer carrier; 300. First punch; 310. First convex surface; 311. First arc-shaped edge; 400. Second punch; 410. Second convex surface; 411. Second arc-shaped edge. Detailed implementation manners

[0051] In order to make the above-mentioned objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0052] In addition, if the terms "first" and "second" appear, these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0053] In the present application, unless otherwise clearly defined and limited, if terms such as "installation", "connection", "connection", "fixation", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0054] In this application, unless otherwise clearly specified and defined, when a first feature is described as being "on" or "under" a second feature or the like, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0055] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0056] Refer to Figure 1 , Figure 1 shows a schematic structural diagram of a pressing and forming device in an embodiment of the present application. The pressing and forming device provided in an embodiment of the present application includes a furnace body 100, a forming carrier 200, a first punch 300, a second punch 400, an annealing device (not shown) and a cooling device (not shown). Preferably, the annealing device is an annealing fan, and the cooling device is a cooling fan. The furnace body 100 is provided with a heating chamber 110, a first pressing chamber 120, a second pressing chamber 130, an annealing chamber 140 and a cooling chamber 150 that communicate with each other. The forming carrier 200 includes a forming die 210 and a transfer carrier 220. The forming die 210 is used to carry the glass component 10 to be formed, and the transfer carrier 220 is used to sequentially transfer the glass component 10 to be formed to the heating chamber 110, the first pressing chamber 120, the second pressing chamber 130, the annealing chamber 140 and the cooling chamber 150. The first punch 300 is disposed in the first pressing chamber 120 and is used to press down relative to the forming die 210 to press the glass component 10 to be formed transferred to the first pressing chamber 120 (referred to as "the first pressing" for short). The second punch 400 is disposed in the second pressing chamber 130 and is used to press down relative to the forming die 210 to press the glass component 10 to be formed transferred to the second pressing chamber 130 (referred to as "the second pressing" for short). The annealing device is disposed in the annealing chamber 140. The cooling device is disposed in the cooling chamber 150.

[0057] It should be noted that the to-be-formed glass component 10 described above can be, but is not limited to, implemented as laminated glass. The transfer vehicle 220 can be, but is not limited to, implemented as mechanisms such as a transfer cart or a conveyor belt.

[0058] When the above-mentioned press-forming device is in use, first, the to-be-formed glass component 10 is heated in the heating chamber 110 to achieve the softening deformation of the to-be-formed glass component 10, so that the to-be-formed glass component 10 fits with the forming die 210; then, the first punch 300 is used to perform the first press on the to-be-formed glass component 10; then, the second punch 400 is used to perform the second press on the to-be-formed glass component 10 to achieve the secondary press-forming of the to-be-formed glass component 10; finally, the annealing device and the cooling device are started to perform annealing and cooling operations on the to-be-formed glass component 10. The above-mentioned press-forming device performs two presses on the to-be-formed glass component 10 through the first punch 300 and the second punch 400, and at least achieves the following beneficial effects:

[0059] First, the surface deviation of the to-be-formed glass component 10 is small. After the first press of the to-be-formed glass component 10 by the first punch 300, the to-be-formed glass component 10 will rebound due to its physical and chemical properties, resulting in a large surface tolerance of the to-be-formed glass component 10 after the first press; but when the second press is performed by the second punch 400, since the to-be-formed glass component 10 has consumed a certain amount of elastic potential energy inside the glass body during the rebound in the first press, during the second press, the to-be-formed glass component 10 is not likely to rebound due to elastic potential energy, but will undergo plastic deformation to reach the final surface shape. Therefore, under the two presses of the press-forming device in the present application, the surface deviation of the to-be-formed glass component 10 is small.

[0060] Second, the production efficiency is improved. The above-mentioned press-forming device performs two presses on the to-be-formed glass component 10 through the first punch 300 and the second punch 400, which can shorten the time of a single press, and then helps to improve the circulation efficiency of the to-be-formed glass component 10 in the furnace body 100, and improve the production frequency and production efficiency.

[0061] Third, the optical performance is improved. Compared with the traditional method of long-time press-forming with a single punch, the present application shortens the time of a single press through two presses, which helps to reduce the influence on the optical performance of the to-be-formed glass component 10 caused by the too long hard contact time between the punch and the to-be-formed glass component 10, reduces the optical pitting of the to-be-formed glass component 10, and also helps to appropriately reduce the temperature of the to-be-formed glass component 10, thereby improving the optical performance of the to-be-formed glass component 10.

[0062] Optionally, a heating mechanism is provided in the above-mentioned heating section for heating and softening the to-be-formed glass component 10. Optionally, the heating mechanism can be, but is not limited to, implemented as heating wires, heating rods, or ceramic plates, etc.

[0063] Optionally, in combination with Figure 2 and Figure 3 As shown, the glass component 10 to be formed has a standard forming surface 11, the first male mold 300 has a first convex outer surface 310, the maximum curvature of the surface of the first convex outer surface 310 is greater than the maximum curvature of the surface of the standard forming surface 11, and the range of the surface tolerance between the first convex outer surface 310 and the standard forming surface 11 is 0 mm - 15 mm. In this way, it is possible to control the surface of the glass component 10 to be formed after the first pressing to fall within the tolerance range of the standard forming surface 11, thereby improving the forming effect of the glass component 10 to be formed.

[0064] It should be noted that the standard forming surface 11 represents the forming standard of the glass component 10 to be formed, and there may be a certain deviation between the actual forming surface of the glass component 10 to be formed and the standard forming surface 11. This forming standard also serves as the surface design reference for the first male mold 300 and the second male mold 400, that is, the surface of the first convex outer surface 310 is implemented to be substantially the same as the standard forming surface 11. The above-mentioned surface tolerance between the first convex outer surface 310 and the standard forming surface 11 refers to the deviation value of the first convex outer surface 310 from the standard forming surface 11. For example, the deviation value of the first convex outer surface 310 from the standard forming surface 11 is 0 mm, 3 mm, 9 mm, 12 mm, or 15 mm, etc.

[0065] Furthermore, the maximum curvature of the surface of the first convex outer surface 310 being greater than the maximum curvature of the surface of the standard forming surface 11 means that the surface shape of the first convex outer surface 310 is designed to be more curved than the surface of the standard forming surface 11. In this way, during the actual pressing process, it is possible to increase the pressing deformation amount of the first convex outer surface 310 on the glass component 10 to be formed, and to make the deformation of the glass component 10 to be formed exceed the standard forming surface 11, so as to adapt to the characteristics of the glass component 10 to be formed during cooling and springback.

[0066] In combination with Figure 2 and Figure 3As shown, preferably, the first convex surface 310 has a first arc edge 311 along its contour. The tolerance range between the first convex surface 310 and the standard forming surface 11 at the position with the maximum curvature of the first arc edge 311 is 0 mm - 4 mm. In this way, the tolerance between the first convex surface 310 and the standard forming surface 11 at the contour position can be further controlled, thereby improving the pressing effect on the glass component 10 to be formed. It should be noted that the tolerance between the first convex surface 310 and the standard forming surface 11 at the position with the maximum curvature of the first arc edge 311 refers to the deviation value of the first convex surface 310 from the standard forming surface 11 at the position with the maximum curvature of the first arc edge 311. For example, the deviation value of the first convex surface 310 from the standard forming surface 11 at the position with the maximum curvature of the first arc edge 311 can be 0 mm, 1 mm, 2 mm, 3 mm, 4 mm, etc.

[0067] More preferably, the tolerance range between the first convex surface 310 and the standard forming surface 11 at the position with the maximum curvature of the first arc edge 311 is 0.5 mm - 2.5 mm. For example, the deviation value of the first convex surface 310 from the standard forming surface 11 at the position with the maximum curvature of the first arc edge 311 can be 0 mm, 1 mm, 2 mm, 3 mm, 4 mm, etc.

[0068] It should be noted that Figure 3 The figure shows a schematic diagram in which the first arc edge 311 coincides with the standard forming surface 11. The standard forming surface 11 is a hypothetical structure, and its purpose is to facilitate observing the design parameter structure of the first arc edge 311. Further, it should be noted that only when it is ensured that the first arc edge 311 of the first convex surface 310 along its contour can completely press the glass component 10 to be formed, can the pressing effect of the first convex surface 310 on the glass component 10 to be formed at the forming surface position be ensured. Therefore, in this embodiment, on the basis of defining the surface tolerance between the first convex surface 310 and the standard forming surface 11, further defining the tolerance between the first arc edge 311 of the first convex surface 310 and the standard forming surface 11 helps to improve the forming effect of the glass component 10 to be formed and reduce the forming deviation of the glass component 10 to be formed.

[0069] As Figure 3 As shown from the perspective, the position with the maximum curvature of the first arc edge 311 refers to the center point position of the first arc edge. The tolerance range between the first convex surface 310 and the standard forming surface 11 at the position with the maximum curvature of the first arc edge 311 being 0 mm - 4 mm means that the gap between the center point position of the first arc edge and the standard forming surface 11 falls within the range of 0 mm - 4 mm. In this way, the pressing effect of the first convex surface 310 on the glass component 10 to be formed along its contour position is improved, and then the pressing effect of the second convex surface 410 on the glass component 10 to be formed at the forming surface position is improved.

[0070] Optionally, in combination Figure 4 As shown, the second punch 400 has a second outer convex surface 410. The maximum curvature of the surface of the second outer convex surface 410 is greater than the maximum curvature of the surface of the standard forming surface 11, and the value range of the surface tolerance between the second outer convex surface 410 and the standard forming surface 11 is 0 mm - 15 mm. In this way, it is possible to control the surface of the glass component 10 to be formed after the second pressing to fall within the tolerance range of the standard forming surface 11, thereby improving the forming effect of the glass component 10 to be formed.

[0071] It should be noted that the standard forming surface 11 represents the forming standard of the glass component 10 to be formed, and there may be a certain deviation between the actual forming surface of the glass component 10 to be formed and the standard forming surface 11. This forming standard also serves as the design basis for the second punch 400 and the surface of the second punch 400, that is, the surface of the second outer convex surface 410 is implemented to be substantially the same as the standard forming surface 11. The surface tolerance between the second outer convex surface 410 and the standard forming surface 11 mentioned above refers to the deviation value of the second outer convex surface 410 from the standard forming surface 11. For example, the deviation value of the second outer convex surface 410 from the standard forming surface 11 can be 0 mm, 3 mm, 6 mm, 9 mm, 12 mm, or 15 mm, etc.

[0072] Furthermore, the maximum curvature of the surface of the second outer convex surface 410 being greater than the maximum curvature of the surface of the standard forming surface 11 means that the surface shape of the second outer convex surface 410 is designed to be more curved than the surface of the standard forming surface 11. In this way, during the actual pressing process, it is possible to increase the pressing deformation amount of the second outer convex surface 410 on the glass component 10 to be formed, and make the deformation of the glass component 10 to be formed under pressing exceed the standard forming surface 11, so as to adapt to the characteristics of the cooling springback of the glass component 10 to be formed.

[0073] More preferably, the value range of the surface tolerance between the first outer convex surface 310 and the second outer convex surface 410 is -10 mm - 10 mm. In this way, it is possible to control the surface difference between the first outer convex surface 310 and the second outer convex surface 410 to reduce the forming deviation of the glass component 10 to be formed during the first pressing and the second pressing respectively. It should be noted that by controlling the maximum curvature of the first outer convex surface 310 and the maximum curvature of the second outer convex surface 410, the surface difference between the first outer convex surface 310 and the second outer convex surface 410 can be controlled accordingly.

[0074] Therefore, the value range of the surface tolerance between the first outer convex surface 310 and the second outer convex surface 410 being -10 mm - 10 mm means that the deviation values of each point on the first outer convex surface 310 corresponding to each point on the second outer convex surface 410 in the overlapping state all fall within -10 mm - 10 mm.

[0075] Understandably, as long as the deviation value of the position corresponding to the maximum curvature of the first convex surface 310 from the position corresponding to the maximum curvature of the second convex surface 410 falls within the range of -10 mm to 10 mm, the deviation values of the remaining positions of the first convex surface 310 from the second convex surface 410 will all fall within the range of -10 mm to 10 mm. Specifically, when the profile tolerance between the first convex surface 310 and the second convex surface 410 is less than 0, it indicates that the maximum curvature of the first convex surface 310 is less than the maximum curvature of the second convex surface 410.

[0076] When the profile tolerance between the first convex surface 310 and the second convex surface 410 is equal to 0, it indicates that the profile shapes of the first convex surface 310 and the second convex surface 410 are the same.

[0077] When the profile tolerance between the first convex surface 310 and the second convex surface 410 is greater than 0, it indicates that the maximum curvature of the first convex surface 310 is greater than the maximum curvature of the second convex surface 410. Exemplarily, the values of the profile tolerance between the first convex surface 310 and the second convex surface 410 are -10 mm, -5 mm, 0 mm, 5 mm, 10 mm, etc. Correspondingly, it can indicate that the deviation value of the position corresponding to the maximum curvature of the first convex surface 310 from the position corresponding to the maximum curvature of the second convex surface 410 is -10 mm, -5 mm, 0 mm, 5 mm, 10 mm, etc.

[0078] In this embodiment, regardless of whether the pressing deformation amounts of the first convex surface 310 and the second convex surface 410 on the glass component 10 to be formed are the same, since the profile tolerance between the first convex surface 310 and the second convex surface 410 is controlled within a reasonable range, it can prevent the pressing deviation of the glass component 10 to be formed from being too large during the first pressing and the second pressing, thereby improving the pressing and forming effect of the glass component 10 to be formed.

[0079] Combined Figure 4 and Figure 5 As shown, preferably, the second convex surface 410 has a second arc edge 411 along its contour. The value range of the tolerance between the position corresponding to the maximum curvature of the second convex surface 410 at the second arc edge 411 and the standard forming surface 11 is 0 mm to 4 mm. In this way, it can further control the tolerance between the second convex surface 410 at the contour position and the standard forming surface 11, thereby improving the pressing effect on the glass component 10 to be formed. It should be noted that the tolerance between the position corresponding to the maximum curvature of the second convex surface 410 at the second arc edge 411 and the standard forming surface 11 refers to the deviation value of the position corresponding to the maximum curvature of the second convex surface 410 at the second arc edge 411 from the standard forming surface 11. For example, the deviation value of the position corresponding to the maximum curvature of the second convex surface 410 at the second arc edge 411 from the standard forming surface 11 can be 0 mm, 1 mm, 2 mm, 3 mm, 4 mm, etc.

[0080] More preferably, the tolerance range between the second convex surface 410 and the standard forming surface 11 at the position with the maximum curvature of the second arc-shaped edge 411 is 0.5 mm - 2.5 mm. For example, the tolerance between the second convex surface 410 and the standard forming surface 11 at the position with the maximum curvature of the second arc-shaped edge 411 can be 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, etc. Adaptively, the deviation value of the second convex surface 410 from the standard forming surface 11 at the position with the maximum curvature of the second arc-shaped edge 411 can be 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, etc.

[0081] It should be noted that Figure 5 The schematic diagram shows the second arc-shaped edge 411 coinciding with the standard forming surface 11, where the standard forming surface 11 is a hypothetical structure, and its purpose is to facilitate observing the design parameter structure of the second arc-shaped edge 411. Further, it should be noted that only when it is ensured that the second convex surface 410 can completely press against the glass component 10 to be formed along the second arc-shaped edge 411 of its contour, can the pressing effect of the second convex surface 410 on the glass component 10 to be formed at the profile position be ensured. Therefore, in this embodiment, on the basis of defining the profile tolerance between the second convex surface 410 and the standard forming surface 11, further defining the tolerance between the second arc-shaped edge 411 of the second convex surface 410 and the standard forming surface 11 helps to improve the forming effect of the glass component 10 to be formed and reduce the forming deviation of the glass component 10 to be formed.

[0082] As Figure 5 shown in the perspective view, the position with the maximum curvature of the above-mentioned second arc-shaped edge 411 refers to the center point position of the second arc edge. The tolerance range of 0 mm - 4 mm between the second convex surface 410 and the standard forming surface 11 at the position with the maximum curvature of the second arc-shaped edge 411 means that the gap between the center point position of the second arc edge and the standard forming surface 11 falls within the range of 0 mm - 4 mm. In this way, the pressing effect of the second convex surface 410 on the glass component 10 to be formed along its contour position is improved, and then the pressing effect of the second convex surface 410 on the glass component 10 to be formed at the profile position is improved.

[0083] Combined with Figure 2 and Figure 6As shown, optionally, the forming die 210 can be, but is not limited to, implemented as a hollow ring and having a forming arc edge 211 along its contour. Preferably, in the plane direction where the forming die 210 abuts against the glass component 10 to be formed, the width of the forming die 210 ranges from 2 mm to 6 mm, so as to control the abutting area between the forming die 210 and the glass component 10 to be formed and ensure the deformation of the glass component 10 to be formed in the hollow position of the forming die 210. Optionally, the above width can be 2 mm, 4 mm or 6 mm, etc. More preferably, in the plane direction where the forming die 210 abuts against the glass component 10 to be formed, the width of the forming die 210 is 2.5 mm or 3 mm to adapt to most application scenarios of the forming die 210.

[0084] Combined with Figure 6 As shown, optionally, the forming arc edge 211 is configured such that when the first punch 300 presses down relative to the forming die 210 to press the glass component 10 to be formed transferred to the first pressing cavity 120, the tolerance range of the position with the maximum curvature of the forming arc edge 211 and the first convex surface 310 is less than or equal to 3 mm. In this way, on the basis of controlling the tolerance between the first convex surface 310 of the first punch 300 and the standard forming surface 11, the tolerance between the forming die 210 and the first convex surface 310 can be further controlled, so as to further improve the pressing effect of the first convex surface 310 on the glass component 10 to be formed at the position of the first arc edge 311, and thus contribute to improving the forming effect of the glass component 10 to be formed. It should be noted that the tolerance between the position with the maximum curvature of the forming arc edge 211 and the first convex surface 310 refers to the deviation value of the position with the maximum curvature of the forming arc edge 211 deviating from the first convex surface 310. Exemplarily, the deviation value of the position with the maximum curvature of the forming arc edge 211 deviating from the first convex surface 310 can be 3 mm, 2 mm, or 1 mm.

[0085] Preferably, the forming arc edge 211 is configured such that when the first punch 300 presses down relative to the forming die 210 to press the glass component 10 to be formed transferred to the first pressing cavity 120, the tolerance range of the position with the maximum curvature of the forming arc edge 211 and the first convex surface 310 is less than or equal to 1.5 mm. Exemplarily, the deviation value of the position with the maximum curvature of the forming arc edge 211 deviating from the first convex surface 310 can be 1.5 mm, 1 mm, or 0.5 mm.

[0086] It should be noted that combined with Figure 6 as shown, Figure 6 shows the theoretical situation where the first punch 300 presses down relative to the forming die 210, more specifically, a schematic diagram of the positional relationship between the first arc edge 311 and the forming arc edge 211. In Figure 6 the structure of the glass component 10 to be formed is omitted.

[0087] Furthermore, asFigure 6 As shown in the perspective view, the position with the maximum curvature of the formed arc edge 211 refers to the central position of the formed arc edge 211. The range of the tolerance between the position with the maximum curvature of the formed arc edge 211 and the first convex surface 310 being less than 3 mm means that the gap between the central position of the formed arc edge 211 and the first arc edge 311 falls within the range of 3 mm.

[0088] More specifically, as Figure 6 As shown in the perspective view, in actual operation, the gaps between the formed arc edge 211 and the first arc edge 311 at both ends are fixed, and the forming mold 210 can be bent to adjust the gap between the central position of the formed arc edge 211 and the first arc edge 311, and then it can be adjusted within the range of less than 3 mm, preferably within the range of less than 1.5 mm, thus improving the forming effect of the glass component 10 to be formed.

[0089] Optionally, the compression molding equipment may but is not limited to further include a control system (not shown). The control system is used to control the downward pressing positions, downward pressing pressures, and downward pressing times of the first punch 300 and the second punch 400 relative to the glass component 10 to be formed respectively, so as to realize the compression molding control of the glass component 10 to be formed, so that the glass component 10 to be formed approaches the standard forming surface 11.

[0090] Specifically, the above-mentioned downward pressing position refers to the starting position of the downward pressing stroke of the first punch 300 or the second punch 400 along the height direction of the compression molding equipment relative to the glass component 10 to be formed. By adjusting and controlling the downward pressing position, it can be ensured that the first punch 300 or the second punch 400 can abut against the glass component 10 to be formed, ensuring the uniformity of downward pressing.

[0091] The above-mentioned downward pressing pressure refers to the pressing pressure of the first punch 300 or the second punch 400 against the glass component 10 to be formed respectively. By monitoring and adjusting the pressing pressure in real time, the compression molding effect of the glass component 10 to be formed can be improved.

[0092] The above-mentioned downward pressing time refers to the holding time when the first punch 300 or the second punch 400 keeps pressing and stationary against the glass component 10 to be formed. By adjusting the holding time of pressing, the optical performance of the glass component 10 to be formed can be improved, and at the same time, controlling the single pressing time helps to improve production efficiency.

[0093] Combined with Figure 7 As shown, on the other hand, the present application also provides a compression molding method, using the above-mentioned compression molding equipment, including the steps of:

[0094] S1. Place the glass component 10 to be formed on the forming mold 210;

[0095] S2. Transfer the transfer carrier 220 into the heating chamber 110 and heat the glass component 10 to be formed;

[0096] S3. Transfer the transfer carrier 220 to the first pressing chamber 120;

[0097] S4. The first punch 300 presses down relative to the forming die 210 to perform the first pressing on the glass component 10 to be formed;

[0098] S5. Transfer the transfer carrier 220 to the second pressing chamber 130;

[0099] S6. The second punch 400 presses down relative to the forming die 210 to perform the second pressing on the glass component 10 to be formed;

[0100] S7. Transfer the transfer carrier 220 to the annealing chamber 140 and start the annealing device for annealing;

[0101] S8. Transfer the transfer carrier 220 to the cooling chamber 150 and start the cooling device for cooling.

[0102] This application applies the above pressing and forming method. By performing two pressings on the glass component 10 to be formed through the first punch 300 and the second punch 400, it helps to reduce the springback of the glass component 10 to be formed, and then reduces the surface deviation of the glass component 10 to be formed. In addition, by performing two pressings on the glass component 10 to be formed through the first punch 300 and the second punch 400, it helps to shorten the time of a single pressing, and then can improve the optical performance of the glass component 10 to be formed and improve the production efficiency.

[0103] Preferably, in the step of the first punch 300 pressing down relative to the forming die 210 to perform the first pressing on the glass component 10 to be formed, the value range of the first pressing time of the first punch 300 pressing the glass component 10 to be formed is 5s - 15s. In this way, the time of a single pressing of the first punch 300 on the glass component 10 to be formed can be controlled, so as to reduce the influence of too long single pressing time on the optical performance of the glass component 10 to be formed and improve the production efficiency. For example, the value of the first pressing time of the first punch 300 pressing the glass component 10 to be formed is 5s, 7s, 9s, 11s, 13s or 15s, etc.

[0104] Preferably, in the second pressing step where the second punch 400 presses downward relative to the forming die 210 on the glass component 10 to be formed, the value range of the second pressing time of the second punch 400 pressing the glass component 10 to be formed is 5 s - 15 s. In this way, the time of a single pressing of the second punch 400 on the glass component 10 to be formed can be controlled, so as to reduce the influence of too long single pressing time on the optical performance of the glass component 10 to be formed and improve the production efficiency. For example, the value of the second pressing time of the second punch 400 pressing the glass component 10 to be formed is 5 s, 7 s, 9 s, 11 s, 13 s or 15 s, etc.

[0105] More preferably, the value range of the sum of the first pressing time and the second pressing time is 10 s - 20 s. In this way, the total time of two pressings of the first punch 300 and the second punch 400 on the glass component 10 to be formed can be controlled. Specifically, in this embodiment, the distribution of the first pressing time and the second pressing time can be adjusted according to actual needs. For example, the value of the sum of the first pressing time and the second pressing time is 10 s, 13 s, 16 s or 20 s, etc.

[0106] Exemplarily, for the glass component 10 to be formed with a relatively large curvature requirement, the first pressing time can be appropriately extended to make the glass component 10 to be formed approach the standard forming surface 11 to the greatest extent during a single pressing. In this way, a relatively short second pressing time can be appropriately allocated during the second pressing; for the glass component 10 to be formed with a relatively low curvature requirement, the first pressing time and the second pressing time can be equally distributed.

[0107] Preferably, in the first pressing step where the first punch 300 presses downward relative to the forming die 210 on the glass component 10 to be formed, the first downward pressing pressure of the first punch 300 relative to the glass component 10 to be formed is 10% - 100% of the weight of the first punch 300. In this way, the first downward pressing pressure can be controlled within a reasonable range and adapt to the self-weight of the first punch 300, and make full use of the weight of the first punch 300 to apply a downward pressure on the glass component 10 to be formed, which helps to improve the pressing effect.

[0108] More preferably, the first downward pressing pressure is 50% - 80% of the weight of the first punch 300.

[0109] Preferably, in the second pressing step of pressing the second punch 400 downward relative to the forming die 210 to press the glass component 10 to be formed, the second downward pressing pressure of the second punch 400 relative to the glass component 10 to be formed is 10%-100% of the weight of the second punch 400. In this way, the second downward pressing pressure can be controlled within a reasonable range, and it can adapt to the self-weight of the first punch 300, making full use of the weight of the first punch 300 to apply a downward pressure to the glass component 10 to be formed, which helps to improve the pressing effect.

[0110] More preferably, the second downward pressing pressure is 50%-80% of the weight of the second punch 400.

[0111] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0112] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A compression molding device, characterized in that, The press-forming device includes: A furnace body, which is provided with a heating cavity, a first pressing cavity, a second pressing cavity, an annealing cavity and a cooling cavity that communicate with each other; A forming carrier, which includes a forming mold and a transfer carrier. The forming mold is used to carry the glass component to be formed, and the transfer carrier is used to sequentially transfer the glass component to be formed to the heating cavity, the first pressing cavity, the second pressing cavity, the annealing cavity and the cooling cavity; A first punch, which is arranged in the first pressing cavity and is used to press down relative to the forming mold to press the glass component to be formed transferred to the first pressing cavity; A second punch, which is arranged in the second pressing cavity and is used to press down relative to the forming mold to press the glass component to be formed transferred to the second pressing cavity; An annealing device, which is arranged in the annealing cavity; A cooling device, which is arranged in the cooling cavity.

2. The press forming device according to claim 1, wherein, The glass component to be formed has a standard forming surface. The first punch has a first convex surface. The maximum curvature of the surface of the first convex surface is greater than the maximum curvature of the surface of the standard forming surface, and the range of the surface tolerance between the first convex surface and the standard forming surface is 0 mm - 15 mm.

3. The press forming device according to claim 2, characterized in that, The first convex surface has a first arc edge along its contour. The range of the tolerance between the first convex surface and the standard forming surface at the position with the maximum curvature of the first arc edge is 0 mm - 4 mm.

4. The pressing and forming device according to claim 3, characterized in that, The range of the tolerance between the first convex surface and the standard forming surface at the position with the maximum curvature of the first arc edge is 0.5 mm - 2.5 mm.

5. The press-forming device according to claim 2, wherein, The second punch has a second convex surface. The maximum curvature of the surface of the second convex surface is greater than the maximum curvature of the surface of the standard forming surface, and the range of the surface tolerance between the second convex surface and the standard forming surface is 0 mm - 15 mm.

6. The press forming device according to claim 5, characterized in that, The range of the surface tolerance between the first convex surface and the second convex surface is -10 mm - 10 mm.

7. The press forming device according to claim 5, characterized in that, The second convex surface has a second arc edge along its contour. The range of the tolerance between the second convex surface and the standard forming surface at the position with the maximum curvature of the second arc edge is 0 mm - 4 mm.

8. The press forming device according to claim 7, wherein The range of the tolerance between the second convex surface and the standard forming surface at the position with the maximum curvature of the second arc edge is 0.5 mm - 2.5 mm.

9. The press-forming device according to claim 2, characterized in that, The forming mold is in a hollow ring shape and has a forming arc edge along its contour.

10. The press forming device according to claim 9, characterized in that, In the plane direction where the forming mold abuts against the glass component to be formed, the range of its width is 2 mm - 6 mm.

11. The press-forming device according to claim 9, wherein, The forming arc edge is configured such that when the first punch presses down relative to the forming mold to press the glass component to be formed transferred to the first pressing cavity, the range of the tolerance between the position with the maximum curvature of the forming arc edge and the first convex surface is less than or equal to 3 mm.

12. The press forming device according to claim 11, wherein, The formed arc edge is configured such that when the first punch presses down relative to the forming die to press the glass component to be formed transferred to the first pressing cavity, the value range of the tolerance between the position with the maximum curvature of the formed arc edge and the first convex surface is less than or equal to 1.5 mm.

13. The press forming device according to any one of claims 1-12, characterized in that, It further includes a control system, which is used to control the pressing positions, pressing pressures, and pressing times of the first punch and the second punch relative to the glass component to be formed respectively.

14. A pressing and forming method, which uses the pressing and forming equipment described in any one of claims 1-13, is characterized in that, It includes the steps of: Placing the glass component to be formed on the forming die; Transferring the transfer carrier to the heating cavity and heating the glass component to be formed; Transferring the transfer carrier to the first pressing cavity; The first punch presses down relative to the forming die to perform the first pressing on the glass component to be formed; Transferring the transfer carrier to the second pressing cavity; The second punch presses down relative to the forming die to perform the second pressing on the glass component to be formed; Transferring the transfer carrier to the annealing cavity and starting the annealing device for annealing; Transferring the transfer carrier to the cooling cavity and starting the cooling device for cooling.

15. The compression molding method according to claim 14, characterized in that, In the step where the first punch presses down relative to the forming die to perform the first pressing on the glass component to be formed, the value range of the first pressing time of the first punch pressing the glass component to be formed is 5 s - 15 s.

16. The pressing and forming method according to claim 15, characterized in that, In the step where the second punch presses down relative to the forming die to perform the second pressing on the glass component to be formed, the value range of the second pressing time of the second punch pressing the glass component to be formed is 5 s - 15 s.

17. The pressing and forming method according to claim 16, wherein The value range of the sum of the first pressing time and the second pressing time is 10 s - 20 s.

18. The compression molding method according to claim 14, characterized in that, In the step where the first punch presses down relative to the forming die to perform the first pressing on the glass component to be formed, the first pressing pressure of the first punch relative to the glass component to be formed is 10% - 100% of the weight of the first punch.

19. The press forming method according to claim 18, characterized in that, The first pressing pressure is 50% - 80% of the weight of the first punch.

20. The press forming method according to claim 14, characterized in that, In the step where the second punch presses down relative to the forming die to perform the second pressing on the glass component to be formed, the second pressing pressure of the second punch relative to the glass component to be formed is 10% - 100% of the weight of the second punch.

21. The pressing and forming method according to claim 20, characterized in that, The second pressing pressure is 50% - 80% of the weight of the second punch.

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